When I print large pictures with Canon iP1500 using Airport Express, the printing stops in the middle of the job about 90% of time. The progress bar halts and the printer blinks green light which is supposed to mean that it's waiting for data. The printer seems to work fine when it's connected directly to the computer. Does this happen to others or is there something I can do to make it work better? I have Mac OS X 10.4.2 and the latest Airport and Canon printer drivers.